/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package com.antgroup.geaflow.service.discovery;

public interface ServiceListener {

    /**
     * Called when a new node has been created.
     */
    void nodeCreated(String path);

    /**
     * Called when a node has been deleted.
     */
    void nodeDeleted(String path);

    /**
     * Called when an existing node has changed data.
     */
    void nodeDataChanged(String path);

    /**
     * Called when an existing node has a child node added or removed.
     */
    void nodeChildrenChanged(String path);
}
